ConnectTheDots

Hi John, thank you, that was the hint. When using 400Hz or higher it accepted the trigger. Best regards

Hello John, for Ain0we are using the 086C03 and 086D05 impact Hammer from PCB (https://www.pcb.com/products?model=086c03 and https://www.pcb.com/products?model=086d05); for Ain1 we are using the 352C03 accelerometer from PCB (https://www.pcb.com/products?model=352c03&item_id=products&m=002c10). We have QuickDAQ Version 3.7.0.49. The Frequency is set to 118Hz with a FFT size of 2048 as we need a resolution of 0.125Hz or better. The Trigger is set to 'analog threshold pos edge' with 20lbf (0.2V) - but even when I play with that value (going higher or lower) I don't get the trigger input. Again, when using 'software triggered' I do see my hammer impacts on the Ain0 channel with an impact force of about 2.5lbf Probably there is a simple basic setting that I screw up and that is causing all those problems. Thanks!

I have a question regarding the QuickDAQ Software. We have the DT9837-B device and want to use it for impact testing and have set up the software in 'FFT Analyzer' mode like explained in the User Manual. But the hammer as trigger is not recognized. We have set up the device and software as follows: Hammer connected to channel DT9837-B(00)-0, Accelerometer connected to channel DT9837-B(00)-1; In the acquisition config -> Trigger Source is set to 'Analog Threshold Pos Edge' with a Threshold value of 50lbf and channel DT9837-B(00)-0. Trigger Mode is 'User Accept-Reject'. As soon we hit 'recording' we see the 'waiting for trigger' information, but the hammer impact is not recognized. When using the trigger as 'software' we do get good results on the hammer channel once we hit with the hammer - so it is not a broken cable. Also when switching to 'data logger' mode and selecting 'Analog Threshold Pos Edge' as Trigger Source with channel DT9837-B(00)-0 the hammer impact is recognized as trigger. Is there a specific setting we have to be aware of in the 'FFT Analyzer' mode that the hammer impact is recognized as trigger? Thanks for your help.